Door lock



May 18, 1943 w, R, scHLAGE 2,319,268

DOOR LOCK Filed March 28, 1941 2 Sheets-Sheet 1 A TTOR May 18, -1943 w. R. scHLAGE DOOR LOCK Filed March 28, 1941 2 Sheets-Sheet 2 Patented May 18, 1943 UNITED STATES PATENT CFFICE DOOR LOCK` Walter R. Schlage, Burlingame, Calif., assigner to Schlage Lock Company, SanV Francisco, Calif., a corporation of California Y Application March 28, 1941, Serial No. 385,663

9 Claims.

This invention relates to a door lock, and especially to a rotatable member mounted within the knob spindle of the lock, said member being rotatable from one or both ends of the Yspindle by lkey or manual means, and by rotation rendering the lock operative or inoperative.

The object of the present invention is generally to improve and simplify the construction and operation of door locks; to provide a lock in which the spindle and the knobs carried thereby are adapted to be dogged against rotation and the latch bolt against retraction; to provide a dogging member which is engageable with the spindle to dog it and the knobs against rotation; to provide a spindle which is tubular and has a rollback member formed thereon, said rollback member cooperating with a retractor plate to either retract or project the latch bolt; to provide a member which is insertable in the tubular spindle and rotatable therein, said memf ber having a dog actuator formed thereon which during rotation will engage the clogging member and move it to dog or undog the spindle; and further, to provide a rotatable dog actuator which may be moved to undog the spindle by depression of the latch bolt.

The door lock is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a Vertical longitudinal section of the door lock, showing the spindle in dogged position;

Fig. 2 is a similar section showing the spindle undogged and the latch bolt depressed;

Fig. 3 is a horizontal longitudinal cross section taken on line III-III of Fig. 1;

Fig. 4 is a perspective View of the retractor plate and the latch bolt carried thereby;

Fig. 5 is a perspective view of the retractor plate head;

Fig. 6 is a perspective View of the clogging member;

Fig. 7 is a perspective view of the tubular spindle;

Fig. 8 is a perspective view of the rotatable member which is insertable in the spindle, and the dog actuator carried thereby; and

Fig. 9 is a perspective view of the key actuated tumbler cylinder.

Referring to the drawings in detail, and particularly to Figs. l to 3 inclusive, a lock housing is shown which consists of a. pair of spaced side plates 2 and 3, joined at their outer edge by a face plate 4. Disposed between the side plates and behind lthe face plate is a frame, generally indicated at A, which may be said to be U- shaped in side elevation.` It consists of upper and lower horizontal arms 5 and 6, a rear connecting arm 1, and a pair of front lugs 8 8, Whichare secured to the face plate 4 by countertersunk screws, rivets or the like, indicated at 9. Extending longitudinally of the frame and disposed centrally between the plates 2 and 3 of the lock housing is a retractor plate generally indicated at B; this plate is best shown in Figs. 1 to 3, and in perspective in Fig. 4. A latch bolt I0 is lsecured on the forward end thereof and extends through an opening formed in the face plate 4, and thus guides and supports the retractor plate at one end. The rear end of the retractor plateis provided with two projecting lugs I I-I I, and these extend into slots I2-I2 formed in the arms 5 and 6 of the frame, formlng a'V guide forv the rear end vof the retractor plate.l The retractor plate is otherwise provided with ya longitudinally extending opening I4 and a slot I5Y at its rear end, which forms a pair of shoulders I6 and a lug I 'I.

Secured to the rear end of the retractor plate is a head member generally indicated at C. This head is composed of two side plates I8-I8 joined at their rear by end plates I9. The spacing between the plates I8 is equal to the thickness of the retractor plate, and the head can accordingly be slipped over the rear end of the retractor plate and will be secured thereto by riveting, spot welding or lany other suitable means.v An openlng20 is formed in the rear of the head, and thisopening has a width equal to that of the slot I5, A notch 2I is formed` in each side plate of the head, and these arey of the same width as the slot I5; they terminate in rounded inner ends, as indicated at 22. The rear opening 20 in the head, and the slot I5 in the retractor plate, form a guide for a plate 23 on the rearend of which is mounted a crossplate 24 havinga dogginglug 25 formed on each side.

TheI side platesA 2 and, 3 o f the lock housing are each provided with an outwardly projecting bearing hub 21, and extending through vsaid hubs andjournaled therein is a tubular spindle generally` indicatedat ,28.l The center portion of the spindle is crosscut as indicated at 29H v(see Flg.- v7) to form a rollback member 30, and the opposite sides of the crosscut are slotted as indicated at 3I3I toreceive `the (logging members 2'5, vas Awill`hereinafter /be` described. VThe spindle"carriesl an outer'knob 32 andI an innrk-nob 33,'a'nd these are xed or permanently secured to the spindle in any suitablemanner".`

Insertable in the end of the spindle which carries the outer knob is a key actuated tumbler cylinder 34, and insertable through the end of the spindle carrying the inner knob is a bar 35 which is circular in cross section to t snugly the interior of the tubular cylinder. Adjacent the inner end of the bar is formed a flat bar 36 which will hereinafter be referred to as a dog actuator, and forming an extension thereof is another cylindrical section 31 and a lug 38 which aligns with the bar 36. The outer end of the bar 35 has a collar 39 formed thereon which seats on the inner end of the spindle and which is overlaid by an annular collar 40 on the inner knob, to secure it against endwise removal. A turnpiece or head 4| is also formed thereon, and by this the bar 35 and dog actuator 36 may be manually rotated.

In actual operation, when the dog actuator or bar 36 assumes a vertical position within the slots l5 and 2| of the retractor plate and head C, the spindle and the knobs 32 and 33 will be dogged against rotation, as the plate 23 will assume its innermost 4position in engagement with the bar 36, and in this position the dogs 25 carried by the bar will enter the notches 3| formed in the spin-` dle, thus dogging it and the knobs against rotation. Hence the door may be said to be locked, as it can not be opened either from the exterior or from the interior by rotation of the knobs. It may, however, be opened from the exterior by a person having theA proper key, as the insertion of a key in the cylinder l34 will permit said cylinder to be rotated. The inner end of the cylinder has a pair of lugs 34a which engage opposite sides of the lugs 38; hence if the cylinder is rotated the lug 3S, the cylindrical member 31, the bars 36 and 35, and the turnpiece 4| will be rotated, and the bar or dog actuator 36 may thus be moved to a horizontal position. In the horizontal position it will force the plate 23 rearwardly, and thus will move the dogs 25 out of the slots 3| of the spindle, thus undogging it and permitting the door to be opened by rotation of the outer knob 32, opening being accomplished by rotation of the spindle through means of the knob 32 by the rollback member 30, as this will-engage one or another of the shoulders I6, thus forcing the head C, the

retractor plate B and the latch bolt |0'to movev inwardly to assume the position shown in Fig. 2...

The door is in this manner opened, and when the knob is released the retractor plate and the latch bolt will' be returned to normal or extended position by means of a pair of compression springs 45 which engage the rear end of the head. The

plate, 23 carrying the dogging members 25 issimilarly actuated by a spring 46.

The opening of the door from the outside after the spindle has `been dogged. has just been described. The door may also be opened from the inside after it has been dogged, by merely grasping the turnpiece 4| and rotating it to turn the bar or dog actuator into horizontal position. When this is done the dogs 25 will again be moved to undogged position, and the spindle may thus be rotated to actuate the rollback member, the retractor plate and the latch bolt. Again, if the door is closed it may be dogged or locked from the interior by grasping the turnpiece 4| and rotating it in the opposite direction, so that the bar 36 or dog actuator will assume the vertical position shown in Fig. 1. In this position spring 46 will force the dogs into dogging position and the spindle and knobs will thus be dogged ory One of the important features of the present invention is the provision of means for rendering it impossible to dog the spindle and then leave the room. If this were possible, one might leave the room and forget the key, and thus be unable to re-enter. In the present instance, if a person should rotate the turnp-iece 4| to move the dog actuator to vertical or dogging position while the door is open, and should then leave the room and close the door, it is obvious that the latch bolt |0 would engage the striker plate shown at |0a and would thus become depressed. When that happens, the lug (see Fig. 2) of the retractor plate would engage the lower edge of the bar 36 and thereby rotate it to assume the position shown in Fig. 2, or in other words cause it to swing from a vertical to a horizontal position. In this position the plate 23 and the dogging members are prevented from reaching dogging position, and the lock is thus automatically undogged whenever the latch bolt is depressed either by manual operation or by engagement with the striker plate. A person may, however, lock or dog the spindle and knobs after leaving the room, by inserting a key and by this means rotating the bar 36 to vertical position. This is desirable as the door can not be locked from the exterior except by a key; thus if a person should leave the room without a key and attempt to lock the door, he or she would have to return to the room and obtain the key before being able to do so.

Broadly speaking, a lock structure is here provided in which the spindle, together with the outer and inner knobs, may be dogged against rotation from the exterior by key actuated means and from the interior by manually operated means, said dogging mechanism being automatically undogged when the latch bolt is depressed.

I have heretofore disclosed pushbutton actuated means, that is, a reciprocally mounted member within the spindle, whereby the same results may be accomplished, but the novel feature here involved is the provision of a rotatable member actuated from one or both ends of the spindle for accomplishing the same result.

It will be noted by referring to Figs. 3 and 8 that the turnpiece 4| is flattened. This is important for two reasons: iirst, it can be grasped more readily when the bar 36 or dog actuator is to be rotated from one position to another; and

second, it visibly indicates the position of the dogs. In actual practice, the attened end of the turnpiece 4| will assume a horizontal position when the dogs are in engagement with the spindle, and a vertical position when the spindle is undogged. Thus by merely looking at the inner knob, one can tell whether the door is locked or not.

It was previously stated that when a key was inserted in the cylinder 34 the tumblers would be retracted and the cylinder would then be free to rotate, so that the lugs 34a could engage and rotate the lug 38 and hence the dog actuator or bar 35. It is however desirable that the rotation of the cylinder 34 be limited to half a revolution. This is accomplished by forming a collar 34h on the outer end of the cylinder, and forming a flat surface 34C on one side thereof. This surface will engage a shoulder 34d formed at the outer end of the spindle and thus limit rotation. A more speciic description is thought unnecessary as the same feature is fully disclosed and described in my co-pending application entitled Door lock, filed March 17, 1941, Serial No.

While this and other features of my invention have been more or less specifically described and illustrated, I Wish it understood that changes may be resorted to within the scope of the appended claims, and that the materials and finish of the various parts may be according to thel eX- perience of the manufacturer or according to varying demands of use.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a lock, a latch bolt, a tubular spindle whereby the latch bolt is actuated, a dog for dogging the spindle against rotation, a rotatable member within the spindle controlling the position of the dog to dog or undog the spindle, and means actuated by depression of the latch'bolt for moving the dog out of clogging position if the spindle is dogged.

2. In a lock, a latch bolt, a tubular spindle whereby the latch bolt is actuated, a dog for dogging the spindle against rotation, a rotatable member within the spindle controlling the position of the dog to dog or undog the spindle, and means actuated by depression of the latch bolt for rotating the rotatable member to a position where it will undog the spindle.

3. In a lock, a latch bolt, a tubular spindle whereby the latch bolt is actuated, a dog for dogging the spindle against rotation and the latch bolt against retraction by the spindle, saidV means leaving the latch bolt free to be depressed, and means actuated by depression of the latch bolt for moving the dog out of dogging position if the spindle is dogged.

4. In a lock, a latch bolt, a tubular spindle whereby the latch bolt is actuated, a dog for clogging the spindle against rotation and the latch bolt against retraction by the spindle, said means leaving the latch bolt free to be depressed, and means actuated by depression of the latch bolt for rotating the rotatable member to a position where it will undog the spindle.

5. The combination with the latch in a lock and the spindle whereby the latch bolt is actuated of an inner and an outer knob secured on the spindle, a manually operable rotatable member projecting through the inner knob, means actuated by said rotatable member for dogging the spindle and knobs against rotation and the latch against retraction by the spindle, said means leaving the latch free to be depressed, and means actuated by depression of the latch for undogging the dog to permit rotation of the spindle and knobs.

6. The combination with the latch in a lock and the spindle whereby the latch bolt is actuated of an inner and outer knob secured on the spindle, a manually operable rotatable member projecting through one end of the spindle, means actuated by said rotatable member for rendering the spindle and knobs inoperative to retract the latch bolt, said means leaving the latch bolt free to be depressed, and means actuated by depression of the latch bolt for restoring the spindle and knobs for operation to retract the latch.

'7. In a lock, a latch bolt, a spindle whereby the latch bolt is actuated, a dog for dogging the spindle against rotation and the latch bolt against retraction by the spindle, said dog leaving the latch bolt free to be depressed, a rotatable member controlling the position of the dog to dog or undog the spindle, and means actuated by depression of the latch bolt for rotating the rotatable member to a position where it will undog the spindle.

8. In a lock, a latch bolt, a retractor plate to which the latch bolt is secured, a tubular spindle, a rollback member on the spindle 'engageable with the retractor plate to actuate the latch bolt, a manually rotatable member Within the spindle, a dog actuated by the rotatable member to undog or dog the spindle and rollback member against operation, and means on the retractor plate for imparting a rotatable movement to the rotatable member to move it from a clogging to an undogged position.

9. In a. lock, a latch bolt, a retractor plate to which the latch bolt is secured, a tubular spindle, a rollback member on the spindle engageable with the retractor plate to actuate the latch bolt, a manually rotatable member within the spindle, a dog actuated by the rotatable member to undog or dog the spindle and rollback member against operation, and a lug on the retractor plate for engaging and for imparting a rotatable movement to the rotatable member to move it from the dogging to an undogged position when inward movement is imparted to the retractor plate.

WALTER R. SCHLAGE. 

